Remove runtime scheme compatibility

api/app/db.py

@@ -1,4 +1,4 @@
-from sqlalchemy import create_engine, text
+from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, DeclarativeBase
 import os
 
@@ -14,32 +14,6 @@ class Base(DeclarativeBase):
     pass
 
 
-def ensure_schema_compatibility() -> None:
-    """Best-effort lightweight migrations for SQLite deployments."""
-    if engine.dialect.name != "sqlite":
-        return
-
-    with engine.begin() as conn:
-        columns = {
-            row[1]
-            for row in conn.execute(text("PRAGMA table_info(assistants)"))
-        }
-        if "voice_output_enabled" not in columns:
-            conn.execute(
-                text(
-                    "ALTER TABLE assistants "
-                    "ADD COLUMN voice_output_enabled BOOLEAN DEFAULT 1"
-                )
-            )
-            conn.execute(
-                text(
-                    "UPDATE assistants "
-                    "SET voice_output_enabled = 1 "
-                    "WHERE voice_output_enabled IS NULL"
-                )
-            )
-
-
 def get_db():
     db = SessionLocal()
     try: